.flex_h{
    display: flex;
    flex-direction: row;
}
.flex_v{
    display: flex;
    flex-direction: column;
}
.align_center{
    align-items: center;
}
.align_start{
    align-items: flex-start;
}
.align_end{
    align-items: flex-end;
}
.justify_around{
    justify-content: space-around;
}
.justify_between{
    justify-content: space-between;
}
.justify_center{
    justify-content: center;
}
.justify_start{
    justify-content: flex-start;
}
.justify_end{
    justify-content: flex-end;
}
.fz12{
    font-size: 12px;
}
.white_content{
    color: #fff;
}